--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/util/TypeWriter.java	2016-12-09 00:47:20.509636044 -0800
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package org.graalvm.compiler.core.common.util;
+
+/**
+ * Provides low-level sequential write access for signed and unsigned values of size 1, 2, 4, and 8
+ * bytes.
+ */
+public interface TypeWriter {
+
+    /**
+     * Returns the number of bytes that have been written, i.e., the byte index of the next byte to
+     * be written.
+     */
+    long getBytesWritten();
+
+    /** Writes a signed 1 byte value. */
+    void putS1(long value);
+
+    /** Writes an unsigned 1 byte value. */
+    void putU1(long value);
+
+    /** Writes a signed 2 byte value. */
+    void putS2(long value);
+
+    /** Writes an unsigned 2 byte value. */
+    void putU2(long value);
+
+    /** Writes a signed 4 byte value. */
+    void putS4(long value);
+
+    /** Writes an unsigned 4 byte value. */
+    void putU4(long value);
+
+    /** Writes a signed 8 byte value. */
+    void putS8(long value);
+
+    /**
+     * Writes a signed value in a variable byte size encoding.
+     */
+    default void putSV(long value) {
+        long cur = value;
+        while (true) {
+            if (cur >= -64 && cur < 64) {
+                putU1(cur & 0x7f);
+                return;
+            }
+            putU1(0x80 | (cur & 0x7f));
+            cur = cur >> 7;
+        }
+    }
+
+    /**
+     * Writes an unsigned value in a variable byte size encoding.
+     */
+    default void putUV(long value) {
+        long cur = value;
+        while (true) {
+            assert cur >= 0;
+            if (cur < 128) {
+                putU1(cur & 0x7f);
+                return;
+            }
+            putU1(0x80 | (cur & 0x7f));
+            cur = cur >> 7;
+        }
+    }
+}